On Tuesday, it was reported that Jolie had picked up and left her previous home in Malibu and moved the kids to a rental mansion in Hidden Hills, Ca.

Angelina Jolie and Brad Pitt’s children Pax, Zahara, Shiloh, Vivienne and Knox (pictured) and the rest of the brood are undergoing therapy over the pair’s divorce. (Newspix/Newspix via Getty Images)

"They didn't leave the rental house for days. It was hard for all of them. They are used to more activities and more entertainment so it's difficult for them to just stay at the house," the insider said, adding that the younger children "don't understand what's going on."

Jolie, 41, filed for divorce from Pitt, 52, on Sept. 19 and on Sept. 30 she and the "Fight Club" actor agreed to a temporary custody arrangement granting Jolie full custody and permitting Pitt visitation with a therapist present for the first meeting.

Pitt has been cooperating with investigators from DCFS after the agency received an anonymous tip he got physical with his 15-year-old son Maddox while on a flight back from France, sources previously told the Daily News.

Angelina Jolie (l.) and Brad Pitt’s children are undergoing therapy in the wake of their divorce. (Jordan Strauss/Jordan Strauss/Invision/AP)

The tipster reported that the actor was both "physically and verbally abusive" to his eldest son. However, a source close to Pitt told The News he may have "acted like an ass" during the argument, but was never physically abusive.

Pitt released a statement following news of the split, explaining that the children are the pair's main focus.

"I am very saddened by this, but what matters most now is the well-being of our kids," the actor said in a statement to People. "I kindly ask the press to give them the space they deserve during this challenging time."